<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
        hello <br>
</body>
<!--

-->
<script>
    //在网页body中填充内容
    document.write("hello js")
</script>
<script src="js/my.js"></script>
</html>